.M-upload{
    @w: 120px;
    width: @w;
    height: @w;
    margin: 0 auto;
    border: 1px dashed #c1c1c1;
    position: relative;
    &Btn{
        position: absolute;
        left: 0;right:0;
        top: 0;bottom:0;
        input[type='file']{
            display: block;
            width: 100%;
            height: 100%;
            opacity: 0
        }
    }
    .mask{
        width: 100%;
        height: 100%;
        text-align: center;
        line-height: @w;
        font-size: 50px;
        color: #818181;
        background: #fff;
    }
}